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Thermogravimetric Pyrolysis Behavior and Kinetic Study of Two Different Organic-Rich Mudstones via Multiple Kinetic Methods

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Listed:
  • Yaoyu Li

    (Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China
    Key Laboratory of Petroleum Resources, Lanzhou 730000, China
    University of Chinese Academy of Sciences, Beijing 100049, China)

  • Shixin Zhou

    (Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China
    Key Laboratory of Petroleum Resources, Lanzhou 730000, China)

  • Jing Li

    (Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China
    Key Laboratory of Petroleum Resources, Lanzhou 730000, China)

  • Zexiang Sun

    (Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China
    Key Laboratory of Petroleum Resources, Lanzhou 730000, China)

  • Wenjun Pang

    (Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China
    Key Laboratory of Petroleum Resources, Lanzhou 730000, China
    University of Chinese Academy of Sciences, Beijing 100049, China)

Abstract

Two representative organic-rich mudstones from the Middle Permian (MP) and the Upper Carboniferous (UC) around the Fukang Depression in the Junggar Basin were selected to study and compare the pyrolysis behavior and kinetics. The MP and UC were described as type I and type II kerogen, respectively. The FTIR and XRD results revealed that the MP contains carbonates and different clay minerals compared to the UC. Peak deconvolution was used for the UC to delineate the pyrolysis process to better understand and compare the similarities and differences in the pyrolysis kinetics of the two mudstones. In addition, the Coats-Redfern method was employed to further differentiate the reaction stages based on the differences in the reaction models during pyrolysis. The kinetic results revealed that the activation energy, pre-exponential factors, and reaction models of the two mudstones have some similarities and differences. Combined with the analysis of the pyrolysis volatiles, the UC sample can release more CH 4 , CO, CO 2 , and aromatic hydrocarbon compounds at high temperatures, indicating that the UC has more oxygen-containing functional groups and aromatics, while the MP has more aliphatics. Through the above studies, the pyrolysis kinetics and mechanism of two organic-rich rocks could be clarified, guiding their development and efficient utilization.

Suggested Citation

  • Yaoyu Li & Shixin Zhou & Jing Li & Zexiang Sun & Wenjun Pang, 2023. "Thermogravimetric Pyrolysis Behavior and Kinetic Study of Two Different Organic-Rich Mudstones via Multiple Kinetic Methods," Energies, MDPI, vol. 16(17), pages 1-17, September.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:17:p:6372-:d:1231671
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    References listed on IDEAS

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    1. Zhang, Juan & Sun, Lulu & Zhang, Jiaqing & Ding, Yanming & Chen, Wenlu & Zhong, Yu, 2021. "Kinetic parameters estimation and reaction model modification for thermal degradation of Beizao oil shale based on thermogravimetric analysis coupled with deconvolution procedure," Energy, Elsevier, vol. 229(C).
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